A lead-iodide based single crystal semiconductor: exploring multi-orientation photoconductive behaviour via intervening isopropyl viologen component between the inorganic [Pb2I6]2−n wires

A lead-iodide single crystal semiconductor with multi-orientation photoconductive property and broad spectrum absorption has been designed and constructed by crystal engineering technique.

An unusual photoconductive property of polyiodide and enhancement by catenating with 3-thiophenemethylamine salt

We serendipitously discovered an unusual photoconductive property of polyiodide, which can be further enhanced through interaction with 3-thiophenemethylamine iodine salt.

A New Type of EO Polymer Based on Polyphosphazenes

Polyphosphazenes containing carbazole grafted by azo nitrobenzene is synthesized by microwave method in this paper. Its structure is characterized by infrared (IR) spectroscopy and UV-visible spectroscopy. This new polymer, with both electro-optic(EO) property and photoconductive property, has unique stability and can be easily processed. Terahertz(THz) wave can be detected using the device which is made with our new polymer. The time domain waveform and frequency spectrum of the THz wave are obtained.

OPTICAL AND PHOTOCONDUCTION IN PbI2 POLYCRYSTALLINE DEPOSITED FROM SOLUTION

A deposited layer of PbI 2 has been prepared by the solution technique. The yellow layers are made of hexagonal platelets parallel to the substrate plane. The photoconductive property has been investigated in the visible and near-IR bands using current measurements at different temperatures. The measurements show that an increase in the sample temperature leads to a remarkable decrease in photocurrent. The bandgap energy and type of optical transition were determined from transmission spectra, and an optical bandgap of Eg=2.32 eV for direct transition was estimated. Using the dependence of photoconductivity from temperature, a bandgap of Eg=2.32 eV was determined as well.